This unique palette box features a removable air-tight lid, brush storage space, five air-tight paint cups and a special cup for thinner. Its 9″ x 12″ palette space accepts most palette papers. Six Sta-Wet Palette sheets, on which acrylics will not dry out, and a sponge are included. Refill paint cups with lids are available in packages of twenty. Packs of refill sheets also available.